
#!/usr/bin/python3
# -*- coding: utf-8 -*-
# @file   : Cartesian.py
# @author : shlian
# @date   : 2018/5/29
# @version: 1.0
# @desc   : 用python实现求笛卡尔积
rmb_str_value =  input('请输入人民币金额(元):' )
# print(rmb_srt_value)
usd_vs_reb = 6.77
usa_str_value = eval(rmb_str_value) / usd_vs_reb
print('美元金额是：%.2f' %usa_str_value)
